Minerals
What physical property shows the color of a powdered mineral?
Streak
A nonrenewable resource is...
a resource that cannot be replaced within a human lifetime.
What is a rock?
an aggregate of one or more minerals or mineraloids
There are about 5400 minerals. How many of them are commonly found in rocks.
Around 50
Geothermal energy is an example of...
a renewable resource.
What rock is formed from fragments of other rocks and/or remains of plants and animals?
Sedimentary Rocks
The two most common elements found in Earth's crust are...
Oxygen and Silicon
Which mining method is most often associated with extracting gold from river sediments?
Placer Mining
The two main types of igneous rocks are classified by whether they cool below or above Earth’s surface.
Intrusive and Extrusive Rocks
Some minerals will commonly have different colors. Why is that
Chemical Formula Impurities
All ore minerals occur mixed with lessdesirable components. This is called...
Gangue
What process compacts and cements sediments into sedimentary rock?
Lithification